I can see Apple going with a half-way house approach. Remember when the MBA came out and Apple were very keen to stress that the slimline Superdrive was available to cater for any optical media needs. Nowadays it's hardly mentioned at all. To this end I can see Apple ditching the ethernet and f/w800 ports and bundling thunderbolt adaptors and then 1-2 generations later, quietly stop bundling it.
A hybrid approach with 32 GB SSD (if the Lion uses about 8 GB, that would leave 24 GB for apps) - this could be soldered onto the logic board and still leave room for a standard HDD. Even the current chipset supports this so I would expect to see this as standard.
I don't think the 13" will get discrete graphics - the Ivy Bridge GPU will be a step up from the current IGP.
In all likelihood Apple (and other manufacturers) will already have working samples of Ivy Bridge chips so they can get an idea of the thermal requirements. If there is a redesign, it makes sense to wait for Ivy Bridge as the new chips will have a lower TDP for the same power which would allow thinning down.
A hybrid approach with 32 GB SSD (if the Lion uses about 8 GB, that would leave 24 GB for apps) - this could be soldered onto the logic board and still leave room for a standard HDD. Even the current chipset supports this so I would expect to see this as standard.
I don't think the 13" will get discrete graphics - the Ivy Bridge GPU will be a step up from the current IGP.
In all likelihood Apple (and other manufacturers) will already have working samples of Ivy Bridge chips so they can get an idea of the thermal requirements. If there is a redesign, it makes sense to wait for Ivy Bridge as the new chips will have a lower TDP for the same power which would allow thinning down.